How to use in-sentence of “air sacs”:
– It occurs when the very small air sacs at the ends of the airways in the lungs start to break down from many sacs to form much bigger sacs.
– This creates a concentration gradient between the air in the air sacs and the blood, meaning there is more oxygen in the air than the blood.
– Instead, muscular air sacs push the air forward through bird lungs.
– Facial air sacs under their skin help protect the impact with the water.
– The air sacs are called alveoli — they have a large surface area, and are moist, thin, and close to a blood supply.
– Although there are many different types of alveoli in the body, the word alveoli is usually used to talk about small air sacs in the lungs of mammals.
